"[F]or most minds are the slaves of external circumstances, and conform to any hand that undertakes to mould them, roll down any torrent of custom in which they happen to be caught, or bend to any importunity that bears hard against them."

"While awake, and in health, this busy principle [the imagination] cannot much delude us: it may build castles in the air, and raise a thousand phantoms before us; but we have every one of the senses alive, to bear testimony to its falsehood."